This is a Kangaroo Pro Junior adjustable height standing desk from Ergo Desktop, along with a removable side extension that allows you to have a mouse, ten-key, or whatever else you’d like sitting alongside your adjustable desktop. Also includes stabilization leg. All are in very good condition with no problems. I bought this six years ago when I was working from home regularly, but I only used it for two years before I moved to an office and put this in storage. This same model is still the Wirecutter’s top pick for convertible standing desks. Product description from the manufacturer: - Work surface and monitor adjust separately giving you dual ergonomics - Main work surface measures 24" wide by 18" deep - Main work surface is adjustable 14.5" above your desk - Holds your monitor on a VESA bracket (included) - VESA mount has 75 x 75 or 100 x 100 hole pattern - VESA mount has tilt adjustment and a separate height adjustment of 6.5" - Comes with one stabilization leg included The convertible desk alone without the extension currently sells for $400 on Amazon or from Ergo. I’m offering the desk plus extension for $180. Cash only. If you have any questions, please message me. Thanks for looking!